, Volume 5, Issue 3, pp 332–336 | Cite as

Reactions of biological antioxidants: II. Fe(III)-catalyzed reactions of methyl linoleate hydroperoxides with derivatives of coenzymes Q and vitamin E

  • E. H. GrugerJr.
  • A. L. Tappel


Lipid free-radical oxidations of ubiquinol-6, ubichromenol-6, ubichromenol-10, and α-tocopherol hydroquinone were kinetically examined in the presence of Fe(III)-catalyzed dissociations of preformed methyl linoleate hydroperoxides. The rates of oxidation of the chromenols increased more than those of the hydroquinones as reaction acidity was increased. Differences in thermal effects upon rates were influenced by the levels of water in the reactions. The hydroquinones exhibited faster rates relative to α-tocopherol than the ubichromenols, while the rates for the latter varied markedly depending on the nature of the solvent.


Absolute Ethanol Hydroquinone Methyl Linoleate Peroxy Radical Isosbestic Point 
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Copyright information

© American Oil Chemists’ Society 1969

Authors and Affiliations

  • E. H. GrugerJr.
    • 1
  • A. L. Tappel
    • 2
  1. 1.Food Science Pioneer Research LaboratoryBureau of Commercial FisheriesSeattle Washington
  2. 2.Department of Food Science and TechnologyUniversity of CaliforniaDavis

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